Safarali Mahdian, Seyed Yahya Kazemi, Behnam Amiri,
Volume 1, Issue 1 (3-2012)
Abstract
Vegetables are attacked by different pests and diseases during their growth. Some fruits such as cucumber have sprayed regularly against diseases like Pseudoperonosporacubensisspecially in humid areas, and after a short time the cucumber are picked up and the amount of pesticide residue are measured and comparing with Maximum Residue Level (MRL). In this research the amount of Mancozeb fungicide has quantified in cucumber samples in Sari district. So in this order 26 samples of cucumber are collected and were carried to the laboratory. Samples of fruits are weighted and washed by using of n- hexan in Suksoleh device. After concentrating the obtained solution put in spectrophotometer set for measuring the optical density with 280 nanometer wave lengths and the amount of uv absorbance of samples and standard solutions were checked. The obtained numbers was changed into all right amount of mancozeb by using Excel software and Cx= α. Cs / β. Vx equation. Results showed that the amount of remained mancozeb fungicide was less than maximum residue limit in 77 percent of samples and more than maximum residue limit in 23 percent of samples in these periods. Also it defined among the samples which have had residue higher than standard limit, just 2 samples have been increased more than 1 milligram per kilogram.
Seyed Moslem Hosseini, Mostafa Darvishnia, H R Hossein Rezaeinejad, Eidi Bazgir, Fatemeh Darvishnia,
Volume 11, Issue 2 (9-2022)
Abstract
Hosseini SM, Darvishnia M, Rezaei Nejad A, Bazgir E, Darvishnia F (2022) The effect of essential oils of thyme, peppermint, savory and two fungicides on the growth of three plant pathogenic fungi. Plant Pathology Science 11(2):52-60.
Introduction: Some plant essential oils have antifungal properties. This study was conducted to determine the effect of three plant essential oils and two chemical fungicides on the growth of three plant pathogenic fungi in vitro. Materials and methods: The effect of different concentrations of three essential oils of thyme (Thymus vulgaris L.), peppermint (Mentha piperata L.) and khuzestani savory (Satureja khuzestanica Jamzad), compared to two chemical fungicides; mancozeb and carbendazim were investigated on the growth of three fungi Alternaria solani, Botrytis cinerea and Fusarium solani by dilution in Yeast Extract Sucrose Broth medium method and their minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) were calculated. Results: Thyme essential oil had the greatest inhibitory effect on A. solani and F. solani among these essential oils, and savory essential oil had the greatest inhibitory effect on B. cinerea. Among the chemical fungicides, mancozeb had the most inhibitory effect on A. solani and carbendazim had the most inhibitory effect on B. cinerea and F. solani. Conclusion: Thyme and khuzestani savory essential oils have a significant inhibitory effect on the growth of these three plants pathogenic fungi.
